#include <limits.h>
#include <stdlib.h>
#include <string.h>
+#include <sys/mman.h>
+#include <ctype.h>
#include "libc.h"
+#include "lock.h"
+#include "fork_impl.h"
+
+#define malloc __libc_malloc
+#define calloc undef
+#define realloc undef
+#define free undef
long __timezone = 0;
int __daylight = 0;
static char std_name[TZNAME_MAX+1];
static char dst_name[TZNAME_MAX+1];
-const char __gmt[] = "GMT";
+const char __utc[] = "UTC";
static int dst_off;
static int r0[5], r1[5];
static char *old_tz = old_tz_buf;
static size_t old_tz_size = sizeof old_tz_buf;
-static volatile int lock[2];
+static volatile int lock[1];
+volatile int *const __timezone_lockptr = lock;
static int getint(const char **p)
{
int i;
if (**p == '<') {
++*p;
- for (i=0; **p!='>' && i<TZNAME_MAX; i++)
- d[i] = (*p)[i];
- ++*p;
+ for (i=0; (*p)[i] && (*p)[i]!='>'; i++)
+ if (i<TZNAME_MAX) d[i] = (*p)[i];
+ if ((*p)[i]) ++*p;
} else {
- for (i=0; ((*p)[i]|32)-'a'<26U && i<TZNAME_MAX; i++)
- d[i] = (*p)[i];
+ for (i=0; ((*p)[i]|32)-'a'<26U; i++)
+ if (i<TZNAME_MAX) d[i] = (*p)[i];
}
*p += i;
- d[i] = 0;
+ d[i<TZNAME_MAX?i:TZNAME_MAX] = 0;
}
#define VEC(...) ((const unsigned char[]){__VA_ARGS__})
return y;
}
-int __munmap(void *, size_t);
-
static void do_tzset()
{
char buf[NAME_MAX+25], *pathname=buf+24;
s = getenv("TZ");
if (!s) s = "/etc/localtime";
- if (!*s) s = __gmt;
+ if (!*s) s = __utc;
if (old_tz && !strcmp(s, old_tz)) return;
+ for (i=0; i<5; i++) r0[i] = r1[i] = 0;
+
if (zi) __munmap((void *)zi, map_size);
/* Cache the old value of TZ to check if it has changed. Avoid
* free so as not to pull it into static programs. Growth
* strategy makes it so free would have minimal benefit anyway. */
i = strlen(s);
- if (i > PATH_MAX+1) s = __gmt, i = 3;
+ if (i > PATH_MAX+1) s = __utc, i = 3;
if (i >= old_tz_size) {
old_tz_size *= 2;
if (i >= old_tz_size) old_tz_size = i+1;
}
if (old_tz) memcpy(old_tz, s, i+1);
+ int posix_form = 0;
+ if (*s != ':') {
+ p = s;
+ char dummy_name[TZNAME_MAX+1];
+ getname(dummy_name, &p);
+ if (p!=s && (*p == '+' || *p == '-' || isdigit(*p)
+ || !strcmp(dummy_name, "UTC")
+ || !strcmp(dummy_name, "GMT")))
+ posix_form = 1;
+ }
+
/* Non-suid can use an absolute tzfile pathname or a relative
* pathame beginning with "."; in secure mode, only the
* standard path will be searched. */
- if (*s == ':' || ((p=strchr(s, '/')) && !memchr(s, ',', p-s))) {
+ if (!posix_form) {
if (*s == ':') s++;
if (*s == '/' || *s == '.') {
if (!libc.secure || !strcmp(s, "/etc/localtime"))
}
}
}
- if (!map) s = __gmt;
+ if (!map) s = __utc;
}
if (map && (map_size < 44 || memcmp(map, "TZif", 4))) {
__munmap((void *)map, map_size);
map = 0;
- s = __gmt;
+ s = __utc;
}
zi = map;
if (map) {
int scale = 2;
- if (sizeof(time_t) > 4 && map[4]=='2') {
+ if (map[4]!='1') {
size_t skip = zi_dotprod(zi+20, VEC(1,1,8,5,6,1), 6);
trans = zi+skip+44+44;
scale++;
const unsigned char *p;
__tzname[0] = __tzname[1] = 0;
__daylight = __timezone = dst_off = 0;
- for (i=0; i<5; i++) r0[i] = r1[i] = 0;
for (p=types; p<abbrevs; p+=6) {
if (!p[4] && !__tzname[0]) {
__tzname[0] = (char *)abbrevs + p[5];
}
}
if (!__tzname[0]) __tzname[0] = __tzname[1];
- if (!__tzname[0]) __tzname[0] = (char *)__gmt;
+ if (!__tzname[0]) __tzname[0] = (char *)__utc;
if (!__daylight) {
__tzname[1] = __tzname[0];
dst_off = __timezone;
}
}
- if (!s) s = __gmt;
+ if (!s) s = __utc;
getname(std_name, &s);
__tzname[0] = std_name;
__timezone = getoff(&s);
dst_off = __timezone - 3600;
} else {
__daylight = 0;
- dst_off = 0;
+ dst_off = __timezone;
}
if (*s == ',') s++, getrule(&s, r0);
n = (index-trans)>>scale;
if (a == n-1) return -1;
if (a == 0) {
- x = zi_read32(trans + (a<<scale));
- if (scale == 3) x = x<<32 | zi_read32(trans + (a<<scale) + 4);
+ x = zi_read32(trans);
+ if (scale == 3) x = x<<32 | zi_read32(trans + 4);
else x = (int32_t)x;
- if (local) off = (int32_t)zi_read32(types + 6 * index[a-1]);
+ /* Find the lowest non-DST type, or 0 if none. */
+ size_t j = 0;
+ for (size_t i=abbrevs-types; i; i-=6) {
+ if (!types[i-6+4]) j = i-6;
+ }
+ if (local) off = (int32_t)zi_read32(types + j);
+ /* If t is before first transition, use the above-found type
+ * and the index-zero (after transition) type as the alt. */
if (t - off < (int64_t)x) {
- for (a=0; a<(abbrevs-types)/6; a++) {
- if (types[6*a+4] != types[4]) break;
- }
- if (a == (abbrevs-types)/6) a = 0;
- if (types[6*a+4]) {
- *alt = a;
- return 0;
- } else {
- *alt = 0;
- return a;
- }
+ if (alt) *alt = index[0];
+ return j/6;
}
}
size_t alt, i = scan_trans(t, local, &alt);
if (i != -1) {
*isdst = types[6*i+4];
- *offset = -(int32_t)zi_read32(types+6*i);
+ *offset = (int32_t)zi_read32(types+6*i);
*zonename = (const char *)abbrevs + types[6*i+5];
- if (oppoff) *oppoff = -(int32_t)zi_read32(types+6*alt);
+ if (oppoff) *oppoff = (int32_t)zi_read32(types+6*alt);
UNLOCK(lock);
return;
}
long long t0 = rule_to_secs(r0, y);
long long t1 = rule_to_secs(r1, y);
+ if (!local) {
+ t0 += __timezone;
+ t1 += dst_off;
+ }
if (t0 < t1) {
- if (!local) {
- t0 += __timezone;
- t1 += dst_off;
- }
if (t >= t0 && t < t1) goto dst;
goto std;
} else {
- if (!local) {
- t1 += __timezone;
- t0 += dst_off;
- }
if (t >= t1 && t < t0) goto std;
goto dst;
}
std:
*isdst = 0;
- *offset = __timezone;
- if (oppoff) *oppoff = dst_off;
+ *offset = -__timezone;
+ if (oppoff) *oppoff = -dst_off;
*zonename = __tzname[0];
UNLOCK(lock);
return;
dst:
*isdst = 1;
- *offset = dst_off;
- if (oppoff) *oppoff = __timezone;
+ *offset = -dst_off;
+ if (oppoff) *oppoff = -__timezone;
*zonename = __tzname[1];
UNLOCK(lock);
}
-void __tzset()
+static void __tzset()
{
LOCK(lock);
do_tzset();
const void *p = tm->__tm_zone;
LOCK(lock);
do_tzset();
- if (p != __gmt && p != __tzname[0] && p != __tzname[1] &&
+ if (p != __utc && p != __tzname[0] && p != __tzname[1] &&
(!zi || (uintptr_t)p-(uintptr_t)abbrevs >= abbrevs_end - abbrevs))
p = "";
UNLOCK(lock);
projects / musl / blobdiff